Door-operating device



1,657,554 L.F.SCHOELKOPF DOOR OPERATING DEVICE Filed July 5, 192'? 3 Sheets-Sheet l |lilill|llllllllilll WMZ@ Jan. 31, 1928.

wmm%%f Jan. 3l', 1928. 1,657,554

L. F. SCHELKOPF nooR OPERATING DEVICE Filed July 5, 1927 3 Sheets-Sheet 2 TTORNEY.

Jan. 31, 1928. 1,657,554

L. F. SCHOELKOPF DOOR OPERATING DEVICEA Filed July, 1927 3 sheets-sheet 5 um 1 11H mul IIIHl 37 INVENToR. v ff f 33 j `L' Y t A si l ya. 125? J 'ATToYRNEx/sf lia-rented Jan. 31,y 1928.

UNITED STATES LOUES F. SCHOELKOPF, F MADISON, WISCONSIN.

noon-ornaarino nnvron.

Application led July 5,

This invention relates to improvements in door operating devices.

lt is one oi the objects of the present invention to provide a door operating device having a remote control which may be easily operated to open and close sliding doors.

A further object of the invention is to provide a sliding door operating device which is actuated pneumatically and Lmechanically, and controlled electrically from one or more remote points.

A further object ot the invention is to provide a sliding door operating device in which approximately onc-halt ot the door opening or closing operation is actuated by means of compressed air, while the remaining hahc ot the operation is actuated by a spring means which is initially put under tension by the compressed air.

n further object ot the invention is to provide a sliding door operating device which, while operating to open or close the door.autornatically7 does not prevent the maimal opening or closing oit the door when desired.

A further objectot the invention is to provide a sliding `door operating device with an air checlr which may be easily adjusted to cushion the opening and closing of the doors and to prevent slamming thereof.

it further object of the invention is to provide a door operating device which may be used tor other purposes than for opening and closing doors.

A further object of the invention is to provide a door operating device in which the air control.mechanism, electromagnets, etc., are mounted upon portions of the frame of the machine.

fr further object of the invention is to provide a door operating device which is of simple construction, is strong and durable and is well adapted for the purpose described.

lilith the above and other objects in view the invention consists ot the improved doorl operating device and its parts and combinations as set forth in the claims, and all equivalents thereof.

lu the accompanying drawings in which the same reference characters indicate the saine parts in all ot the views:

It is :in inside view ot a slidingl door neto which the improved door operconnected, the doorbeing @ine in tio-sed' position and 1927. serial no. 203,4e4.

partly open position in dotted line, the view also showing in diagrammatic form the circuit connection to the battery and the remote control switch;

Fig. 2 is a longitudinal sectional view of the main portion of the device;

F 3 is an outside view of the main portion ot' the device taken at right angles to Fig. 2;

Fig. l is a sectional detail view ot the attaching portions of the device and connected parts; y

5 is a detail view partly in section;

` Fig. 6 is a transverse sectional detail view taken on line 6 6 of Fig. 4;

Fig. is a longitudinal sectional detail view ot the outer end portion of the air cylinder on a slightly larger scale;

Fig. S is a similar view taken at right angles to Fig. 7 g and Fig. 9 is a transverse sectional view taken on line 9-9 of Fig. 3 and on a larger scale.

Referring to the drawings, the numeral 10 indicates a door trame having a sliding door 11 suspended from a track 12 mounted on the frame, ot ordinary construction. The improved door operating device comprises an angular bracket or main trame 18 having bolt openings 13 tor attaching yit to the door :trame or ceiling and is provided with a two part arm 1d which is pivotally connected at its inner end to the bracket 13 by a pivotal member 15. The outer or lower end of the arm is pivotally connected to a bracket member 16 which is rigidly secured to the door. The arm 14 is formed of an inner head 17 which surrounds the pivot member and terms the pivotal connection therewith. Spaced guide rods 18 connected to` the inner head 17 project downwardly therefrom and at their outer ends are connectedto an outer head 19. These rods are equidistantly spaced transversely and medially of their length are reinforced by a twdpart collar 2O `which is Jformed with inner recesses 20 to receive and maintain said rods in position. The two parts ot the collar are secured together by bolts and nuts 21. A closed inner end cylinder 22 is positioned between the rods 18 and is provided ywith an outer cap QS. Said cap is ot Such diameter that it will be maintained in 'position aud t'reely slide between the uide rods 18. A coiled spring 25 enclosed vthe' guide ij'ods 18 and sui unding the 'linder .22 interposed between the lynn-f :tlow ot' air trom the tube to the valve casing, an electric circuit in which the electromagnet is included, and a remotely positioned switch included in the electric circuit .tor controlling the electroinagnet.

ll. 'lhe combination with a sliding door and its trame, ot a means tor opening and closing :said door, comprising a combined pneumatic and spring means tor sliding the door from one position to another, the pneumatic means initially sliding the door for apw proaimately one-hall' portion ot its move ment and the spring means completing the movement, and an electron'iagnet means tor controlling the operation oi the parte.

l2. 'lhe combination with a sliding door and its trame, ot a means tor opening and closing said door, comprising a combined pneumatic and spring means tor sliding the door from one position to another', the pneumatic means initially sliding the door for approximately onelialt portion of its movement and at the same time compressing the spring means and the spring means com pleting the movement in either direction, and an electromagnetic means for controlling the operation of the parts.

i3. rllllie combination with a sliding door and its frame, ot a means for openingr and closing said door, comprising a bracket member connected to the frame, an inner arm part pivotally connected to the bracket and having a valve, a trip lever pivot-ally connected to the arm part for actuating the valve, an outer arm part pivotally connected to the sliding door, a cylinder' connected to the outer arm part and slidingly engaging the inner arm part, a piston within the cylinder and having a stem which is connected to the outer end of the inner arm part, means for supplying air under pressure to the cylinder to move itinwardly, said air being controlled by the valve, a trip lever pivotally connected to the inner arm part and engaging the valve and movable outwardly to permit the valve to move to open position, means for automatically moving the trip lever inwardly, a coiled springinterposed between the inner and the outer arm parte tor moving the outer arm part outwardly, and a remotely controlled electromagnet carried by the inner arm part for controlling the trip lever.

lll. rlhe combination with a sliding door and its frame, ot a means for opening and closing said door, comprising a bracket mem ber connected to the trame, part pivotally connected to having a valve', a trip lever pivotally con nected to the arm parttor actuating the valve, an outer arm part pivotally connected to the sliding door, a cylinder connected to the outer arm part and slidingly engaging the inner arm part, a piston within the cyl inder and having a stem which is connected to the outer end oi"- the inner arm part, means for supplying air under pressure to the cylinder to move it inwardly, said air being controlled by the valve, a trip lever pivotally connected to the inner arm part and engaging the valve and movable outwardly to permit the valve to move to open position, means engaged by the inward movement ot the arm and the cylinder for automatically moving the' trip lever to its inner position, a coiled spring interposed between the inner and the outer arm parts for moving the outer arm part outwardly, and a remotely controlled electromagnet carried by the inner arm part tor controllii'ag` the trip lever.

l5. rllie combination with a sliding door and its frame, ot a means for opening and closing said door, comprising a bracket member connected to the trame, an inner arm part pivotally connected to the arm and having a valve, a trip lever pivotally connected to the arm part :tor actuating the valve, an outer arm part pivotally connected to the sliding door, a cylinder connected to the outer arm part and slidingly engaging the inner arm part, a piston within the cylinder and having a stem which is connected to the outer end of the inner arm part, means for supplying air under pressure to the cylinder' to move it inwardly, said air being controlled by the valve, a trip lever pivotally connected to the inner arm part and engaging tlie valve and movable outwardly to permit the valve to move t-o open position, adjustable means for limiting the outward movement of the trip lever, a rod engaged by the inward movement of the cylinder for automatically moving the trip lever to its inner position, a coiled spring interposed between the inner and the outer arm parts lor moving the outer arm part outwardly, and a remotely controlled electromagnet carried by the inner arm part tor controlling the triplever. l In testimony whereof, I atEX my signature.

LOUIS F. SCHOELKOPF.

an inner arm` 

